@Override
public void start(Collection<? extends Location> locations) {
super.start(locations);
connectSensors();
Time.sleep(getConfig(DELAY_BEFORE_ADVERTISING_CLUSTER));
// FIXME: add a quorum to tolerate failed nodes before setting on fire.
Optional<Entity> anyNode =
Iterables.tryFind(
getMembers(),
new Predicate<Entity>() {
@Override
public boolean apply(@Nullable Entity entity) {
return (entity instanceof RiakNode
&& hasMemberJoinedCluster(entity)
&& entity.getAttribute(RiakNode.SERVICE_UP));
}
});
if (anyNode.isPresent()) {
log.info(
"Planning and Committing cluster changes on node: {}, cluster: {}",
anyNode.get().getId(),
getId());
Entities.invokeEffector(this, anyNode.get(), RiakNode.COMMIT_RIAK_CLUSTER);
setAttribute(IS_CLUSTER_INIT, true);
} else {
log.warn("No Riak Nodes are found on the cluster: {}. Initialization Failed", getId());
setAttribute(SERVICE_STATE, Lifecycle.ON_FIRE);
}
}
@Test
public void testCancelled() throws InterruptedException, ExecutionException {
Task<List<?>> t =
Tasks.sequential(sayTask("1"), sayTask("2a", Duration.THIRTY_SECONDS, "2b"), sayTask("3"));
ec.submit(t);
synchronized (messages) {
while (messages.size() <= 1) messages.wait();
}
Assert.assertEquals(messages, Arrays.asList("1", "2a"));
Time.sleep(Duration.millis(50));
t.cancel(true);
Assert.assertTrue(t.isDone());
// 2 should get cancelled, and invoke the cancellation semaphore
// 3 should get cancelled and not run at all
Assert.assertEquals(messages, Arrays.asList("1", "2a"));
// Need to ensure that 2 has been started; race where we might cancel it before its run method
// is even begun. Hence doing "2a; pause; 2b" where nothing is interruptable before pause.
Assert.assertTrue(cancellations.tryAcquire(10, TimeUnit.SECONDS));
Iterator<Task<?>> ci = ((HasTaskChildren) t).getChildren().iterator();
Assert.assertEquals(ci.next().get(), "1");
Task<?> task2 = ci.next();
Assert.assertTrue(task2.isBegun());
Assert.assertTrue(task2.isDone());
Assert.assertTrue(task2.isCancelled());
Task<?> task3 = ci.next();
Assert.assertFalse(task3.isBegun());
Assert.assertTrue(task2.isDone());
Assert.assertTrue(task2.isCancelled());
// but we do _not_ get a mutex from task3 as it does not run (is not interrupted)
Assert.assertEquals(cancellations.availablePermits(), 0);
}